C-N Coupling via Antiaromatic Endocyclic Nitrenium Ions.
Shyamal Kanti BeraMd Toufique AlamPrasenjit MalPublished in: The Journal of organic chemistry (2019)
Herein, we report a C-N coupling reaction via antiaromatic endocyclic nitrenium ions. The nitrenium ion intermediate was generated by a combination of iodine(III) reagent PhI(OCOCF3)2 and the N-H center of benzimidazole units at ambient laboratory conditions. Metal-free synthesis of benzimidazole-fused phenanthridine derivatives was achieved in good to excellent yields.